Aquatic-beetle
Guides
Thermonectus intermedius
Thermonectus intermedius is a predaceous diving beetle in the family Dytiscidae, first described by Crotch in 1873. The species is distributed in North America. As a member of the genus Thermonectus, it is an aquatic predator inhabiting freshwater environments. The genus is known for species that are active swimmers and visual hunters in aquatic habitats.
Thermonectus nigrofasciatus
Mottled Diving Beetle
Thermonectus nigrofasciatus is a diving beetle species in the family Dytiscidae, native to the eastern United States. The species name refers to the distinctive black, postmedian transverse blotch on its elytra. It is commonly known as the Mottled Diving Beetle and has been documented in over 500 observations on iNaturalist.
Tropisternus collaris
collared water scavenger beetle
Tropisternus collaris is a species of water scavenger beetle in the family Hydrophilidae. It is found across a broad geographic range including the Caribbean, North America, and South America. The species was described by Fabricius in 1775, originally as Hydrophilus collaris. Several subspecies have been recognized, including T. c. collaris, T. c. mexicanus, T. c. proximus, T. c. striolatus, and T. c. viridis.
Tropisternus columbianus
water scavenger beetle
Tropisternus columbianus is a water scavenger beetle in the family Hydrophilidae. It is known to produce sound through stridulation, a behavior studied in western Oregon populations alongside congeneric species. The species occurs across western North America and has been recorded in aquatic and semi-aquatic habitats.
Tropisternus fuscitarsis
Tropisternus fuscitarsis is a species of water scavenger beetle in the family Hydrophilidae, first described by Sharp in 1882. The species has been recorded from Mexico, Central America, and South America including Brazil and Uruguay. As a member of the genus Tropisternus, it is associated with aquatic and semi-aquatic habitats. The specific epithet "fuscitarsis" refers to dark or dusky tarsi.
Tropisternus lateralis limbalis
Tropisternus lateralis limbalis is a subspecies of water scavenger beetle in the family Hydrophilidae. It is known to produce acoustic signals, with males generating sounds that function in mate attraction and courtship. The subspecies has been documented in western Oregon and has a broad distribution across North America extending into South America and the Caribbean.
Tropisternus lateralis nimbatus
Tropisternus lateralis nimbatus is a subspecies of water scavenger beetle in the family Hydrophilidae. It colonizes temporary playa wetlands on the Southern High Plains of Texas during flood periods, arriving from surrounding aquatic habitats via aerial dispersal. The subspecies has been documented across a broad geographic range including North, Central, and South America, as well as Caribbean islands.
Tropisternus mixtus
Tropisternus mixtus is a species of water scavenger beetle in the family Hydrophilidae, first described by John Lawrence LeConte in 1855. It is distributed across eastern and central North America, with records from Canada and the United States. Like other members of its genus, it is associated with aquatic or semi-aquatic habitats. The species is relatively poorly documented in scientific literature compared to some congeners.
Tropisternus natator
Tropisternus natator is a species of water scavenger beetle in the family Hydrophilidae. It occurs across eastern and central North America, from southern Canada through the eastern United States. The species inhabits aquatic environments and was described by d'Orchymont in 1938.
Tropisternus sublaevis
Tropisternus sublaevis is a species of water scavenger beetle in the family Hydrophilidae. The species was described by John Lawrence LeConte in 1855. It is distributed across western and central North America, with records from the United States and Mexico. The species belongs to the subgenus Tropisternus (Tropisternus) and has been subject to some taxonomic confusion, with a later homonym described by Blatchley in 1910.
Uvarus lacustris
Uvarus lacustris is a small predaceous diving beetle in the family Dytiscidae, first described by Thomas Say in 1823. It belongs to the tribe Bidessini within the subfamily Hydroporinae. The species is documented from North America, with confirmed records from Canada (Ontario) and the United States. As a member of Dytiscidae, it is an aquatic predator, though specific ecological details remain poorly documented in published literature.
Uvarus subtilis
Uvarus subtilis is a small predaceous diving beetle in the family Dytiscidae, subfamily Hydroporinae. First described by LeConte in 1852, this species is distributed across North America, with records extending to British Columbia, Canada. As a member of the tribe Bidessini, it inhabits aquatic environments where it preys on small invertebrates.
Uvarus texanus
Uvarus texanus is a predaceous diving beetle in the family Dytiscidae, first described by Sharp in 1882. The species is known from North America and is placed in the tribe Bidessini within the subfamily Hydroporinae. As a member of Dytiscidae, it is an aquatic beetle adapted to life in freshwater environments. Available information on this species is limited, with only seven documented observations in iNaturalist as of the knowledge cutoff.
Vatellus mexicanus
Vatellus mexicanus is a diving beetle species in the family Dytiscidae, subfamily Hydroporinae, and tribe Vatellini. First described by Sharp in 1882, this species is distributed across Middle America and North America. As a member of the Vatellini, it belongs to a group of small to minute diving beetles often associated with riparian habitats. The genus Vatellus contains species that are typically found in tropical and subtropical regions.
Zaitzevia parvula
riffle beetle
Zaitzevia parvula is a species of riffle beetle in the family Elmidae. It was described by Horn in 1870. The species is found in North America, with records from Alberta and British Columbia in Canada. Two subspecies are recognized: Z. p. parvula and Z. p. thermae.